K2 5149 is alive

[KO5V]

Good evening everyone,

This is my first post to the list, and I have what I hope is not a stupid
question.

I just finished my K2, #5149. With the exception of a missed solder joint
on the thermistor
board, and my brutalizing the tiny in-line choke on the bottom of the RF
board, the rig
came to life, and appears to be performing as expected. With just a crummy
hunk of wire,
that I literally threw on the living room floor, I am truly amazed at what
I can hear.

I have just finished building and installing the SSB mod, and I would like
to use my Heil BM-10,
with the HC5 element. Does anyone have any experience using this (or a
similar) set-up, and if so,
could you please share any details? I notice that the Heil set that
Elecraft sells requires a
resistor on connector P1, but I also see a reference to a Heil pre-amp in
the tech notes section
of the site.

Thanks in advance & 73,

Jim Faulkner  K5ZED
Rio Rancho, NM




--- Jim Faulkner
--- [hidden email]


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[Geoffrey Mackenzie-Kennedy-2]

Morning Jim,

>From what I have read on the Reflector, there seems to be some disagreement
as to whether the Heil HC5 (and HC4?) element can or cannot drive the K2 to
full RF output!! Here I use the Heil Pro-Set Plus boom mike with HC4 and HC5
elements directly driving my K2/100 #3255 without an external preamplifier.
>From day one I have had no difficulty in getting the 100w output, measured
with a calibrated 50 ohm load and scope, on all bands - no shouting.
Likewise the full specified output from the K2 alone. I have not
incorporated any of the mods published since I built the K2, which means
that the 'original' bandwidth of the KSB2's filter is in use, and I don't
intend to change this. I swept the filter to choose the BFO frequency(s).

It could be that the components in my K2/100 are all at the 'right' value in
their tolerance ranges for higher gain, but I doubt that -  although I was
lucky with the 6 inductive resistors that affect the gain of the KPA100. The
gain dip in mine was between bands, but it did not prevent the KPA100 from
producing the 100w on all bands.

Hope that this helps.

73,
Geoff
GM4ESD

P.S. I am not employed by Heil!


Jim Faulkner, K5ZED, wrote on Tuesday, November 22, 2005 at 05:54 AM

> Good evening everyone,
>
> This is my first post to the list, and I have what I hope is not a stupid
> question.
>
> I just finished my K2, #5149. With the exception of a missed solder joint
> on the thermistor
> board, and my brutalizing the tiny in-line choke on the bottom of the RF
> board, the rig
> came to life, and appears to be performing as expected. With just a crummy
> hunk of wire,
> that I literally threw on the living room floor, I am truly amazed at what
> I can hear.
>
> I have just finished building and installing the SSB mod, and I would like
> to use my Heil BM-10,
> with the HC5 element. Does anyone have any experience using this (or a
> similar) set-up, and if so,
> could you please share any details? I notice that the Heil set that
> Elecraft sells requires a
> resistor on connector P1, but I also see a reference to a Heil pre-amp in
> the tech notes section
> of the site.
>
> Thanks in advance & 73,
>
> Jim Faulkner  K5ZED
> Rio Rancho, NM.

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